<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			div h1:first-of-type{
				font-size: 150px;
				color:red;
			}
			/* div h1:nth-child(3n){
				border: 20px dotted gold;
			} */
			div h1:nth-of-type(3n){
				border: 20px dotted gold;
			} 
		</style>
	</head>
	<body>
		<div>
			<h2>h5c3</h2>
			<h1>java</h1>
			<h1>c++</h1>
			<p>不想当厨子的司令，不是个好司机</p>
			<h1>vb</h1>
			<h1>basic</h1>
			<h1>html</h1>
			<h1>python</h1>
		</div>
	</body>
</html>
